const S4 = function () {
    return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
};
export function guid() {
    return (S4() + S4() + '-' + S4() + '-' + S4() + '-' + S4() + '-' + S4() + S4() + S4()
    );
}